Locking mechanism for dumping bodies



April 30, 1929. l.. T. woon I LOCKING MECHANISM FOR DUMPING BODIES Filed MaIGh 14, 1927 3 Sheets-Sheet 9m. n, @A wm. v m k E a. l H v vm l n La, u m s 0 o ,0 ,um v .Q f f! A April 30, 1929. T, WQOD 1,711,299

LOCKING MECHANISM FOR DUMPING BODIES Filed March 14, 1927 s shets-sheet 2 www..

April 3o, 1929. L. T., wcon 1,711,299

LOCKING M'EoHANvIsM Fon DUMPING BODIES .y r Fnedlmrch 14, 1927 s sheets-sheet s W1 jfl/ifm;

Patented Apr. 30, 1929.

UNITED :STATES PATENT `v iLOGAN rn'woon, or DETROIT, MICHIGAN.

LOCKIG MECHANISM "FOR DU"1\[P].'NGv BODIVES.

Application lcdLMarch 14, 1927,Seria1 No. V175,118,an. inFrance November?, 1926.l

This'inventionrelates to alocking mechanism 'for dumpingy bodies Which-are mounted ontrucks for tiltingfinlthree directions7 one to the rear about a horizontal axis located transversely of the vehicle, and-the othersto either side of thebody about horizontal axes ln the present construction they body is carried ontwo pairs of bearings, one pairat each side l'oli-the truck.` The front 'bearings of each pairoi bearings are normally unlocked so that the body--mayfbe tilted upwardly at its frontend aboutareartransverse horizontal axis. `If,`hovvever, it--is'desired totilt the'body to either side a single manually controlled device is -used ,Which when moved to one side lunlocksthe-'bearings at one side otthe'body and -locksthe bearings atthe opposite side sotfhat the body may be tilted about a horizontal axis parallel Vto the length ofthe vehicle whichis coincident Withthe axes of the-bearingswhichare locked in place. Moving said device to the opposite side correspondingly(locks and unlocks certain of said bearings so that the body may be tilted'in the opposite directionand'dump its contentsat'the lopposi'tefside of the vehicle. 'l/Vith the manual control device-ata neutral position the body is locked With'respect tothe rearbearings and unlocked at the 'front for the rear dumping movement of the truck. body.

lt is an object andzpurpose oft-hepresent invention to provide ksimplek and effective mechanism for attainment of the `above described ends as Well as'many othersnot at this time stated, all of which will appearf 'fully and in detail as understanding ofthe invent-ion is had'from the following description taken in connection With the accompanyin g drawings, in vvhich,. Fig. 1 .is a side elevation of a truck ,with dumping body applied thereto and equipped with my invention.

'ig'Q a front elevation the control smoved.

leverwhich -controls the locking` andi unlock-v ing of the'bearings.

Figff is a" vertical Jsection ofiiafdetail of construction, said section being taken substantiallyon-theplane of line 3-3 of'Fig-4.

Fig. 14 is afragmentary `plan view shoW- ing the rearjpart ofthe truckfframefequipped with my invention and with the body ,re-

Fig; 5 is a fragmentary transverse vertical ksection illustrating the positionqoff-the'body when thelsame is` tilted to one iside.

.F1g.16-f1s a fragmentary lenlarged .vertical vsection through the mechanism of the `iiivention vshowvingthe Ifront locking; devices in normal positron Wherein-V thel front r bearings lofthe bodyr are unlocked i Fig.'7 is a similar View :illust-rating the normal position ofthe :locking devices :for

the f rear bearings fand showing the same locked, f and l F ig; 8 isa fnagmentaryfenlargedside/elevation at the Yrear part ofthe vehicle showling A'the l manner y'in Which the: rear bearings lare maintarnedin lockedpositi'on ontilting of the! truck body for rear dumping.

*Like reference characters refer' to like parts "in the diliierentgures ofthe draW- ings. y i The truck is ofany conventional construction havinga chassis frame with spaced apart side frame members l connected bythe usual cross members. On the truck `frame a cylinder QI-is mountedwhich has oil pumped into it throughthe pipe Sin or'der to vforce a. piston therein fand thepiston rod 4 connected thereto to the rear. 'The return pipe for the oil and 4the-bypassconstruction are not illus# trated in this applicatiom the same being fully shown and describedy inl the application to Whichreference has been previouslymade.

It -isenough to saythat therearend ofthe piston rod-carries across head 5 equipped with rollersv 6 lat itsendswhich l traversey tracks -7 carried 'ibyltheftruck irame'and that the cross head-also has -other rollersl 8y which' bear againstlifting cams v'9i attache'dito the under side of the body or to the rear transverse horizontal rod ,about lvvhich lit tilts upwardly,

and that .this construction is also equipped -With a-l transverse cam beamfidentical :with thatshotvn in the previouslyy mefltioned apd Y plication for patent, so that the rearward movement of the piston and the connected cross head serves to tilt the body and dump its contents to the rear in one position of the locking device for the side 'bearings which will hereafter be described, or the body may be tilted to either side upon locking some and unlocking` others of said bearings.

On a plurality of cross sills 10 (see Fig. 5) the dumping body 11, is secured. This body has a rear tail gate 12 of usual construction pivotally mounted to swing to the rear about a horizontal rod at its upper'end. It also, at each side, has a pivotally mounted side door 13 each of which may swing outwardly at its lower part, the axis of swing being an upper horizontal rod 14 on which each of the side doors 13 is mounted. The sides 13 are retained at inner closing position by latch lingers 15, a number of which are secured to a horizontal rock shaft 16, one at each side of the truck body, and each of which mayy be rocked so as to release or secure a side door 13 by means of an operating handle 17 fixed to the front end of each rod 16. The tail gate 12 may also be latched in place by a latch 18 which is operated by a lever 19 mounted at the front of the body and connected to the latch by a connecting rod 20.

At the rear end of the truck frame and transverse of the same a horizontal shaft 21 is mounted for turning, being secured to and rotatably mounted on the frame by the bearings 22 (see Fig. 4). The Cross sills 10 at the under side of the body are con nected to ytwo spaced apart channel bars 23 lying above and parallel to the chassis side frame members 1. Adjacent the front and rear ends of each of the channels 23 a pair of brackets 24 are secured and ext-end downwardly and outwardly. Between each pair of brackets a bearing pin 25 isn ountedl The pins 25 at the rear of the body are received in shallow U-shaped. sockets 26 which, for con` venieuce, are made at the ends of the rod or shaft 21. The front pins 25 are received in similar sockets 26a made in members connected to the opposite ends of a cross bar 21a which lies above and is secured to the chassis frame members 1 (see Fig. 4). The body of the truck, accordingly, is supported adjacent its four corners. It is evident that the pins 25 at a side of the truck are in alignment and that the body may be tilted to either side by turning about the axis of the pins 25 at a side of the vehicle. It is also evident that when the body is tilted upwardly at its front end the shaft 21 will turn by reason of the engagement of the rear pins 25 with the rear sockets 26.

Two shafts 27 and 28 are located at opposite sides of the truck frame being mounted at their rear ends in bearings in brackets 29 attached to the side members 1 of the frame and at their front ends being` mounted on the cross bar 21a. The shafts 27 and 28 are connected by a cross rod 30 which passes through the webs of the chassis framemembers 1 and at each end is equipped with a head 31 having a short vertical slot therein. The slots receive pins 32 projecting from the lower ends of arms 33 which in turn are fixed one to each of the shafts 27 and 28. Roels ing the shaft27 accordingly in one direction through this connection causes a similar rocking of the shaft 27.

At the front end of the shaft 27 a gear seg ment 34 is secured, meshing with which is a second gear segment 35 of like pitch which is secured at the rear end of a third shaft 36 lying alongside of and mounted for rocking movements in bearings at the end of brackets 37 farried by and extending from the frame member 1, as shown in Figs. 1 and 4. A bell crank lever 38 having an arm 39 at Y its lower end extending at right angles to the other or ver Jical arm of the lever is .pivotally mounted on a casting 40 secured above and at the front end of the shaft 36. An arm 41 extends from the shaft 36 and its end of the arm 39 are connected by a link 42. The cast-ing 40 is arc-shaped at its upper side and lever 38 is movable tot-hree (liderent positions over the arc and equipped with the usual releasable latch means for holding it in any one of the three positions that it may take. At the intermediate or vertical position, shown in Fig. 2, the lever 38 is vertical and this is what may be termed the neutral for normal position of the lever. The other positions are .at either side of the neutral or normal position and it is evident that when the bell crank lever is moved to one or the other of said positions shaft 36 is turned and simultaneously shafts 27 and 28 are rocked about their axes equal amounts.

Adjacent the front end of each of shafts and 28 an irregularly shaped cam member 43 is fixed having the form best shown in Figs. 5 and 6, and having a continuous flange or lip 44 extending forwardly around its edges.

rlfhe shape of the members 43 is such that the lip is curved on the are of a circle, as indicated at 44, for a considerable distance con cent "ic with the shaft 27 or 28. This at one end joins with a second curved portion 45 struck on a much shorter radius and is then reversely curved as indicated at 46.

A t the upper end on the outer leg of each of the U-shaped sockets 26 and 26ZL a latching member is pivotally mounted at 47 and is formed with a downwardly and outwardly extending' arm 48 bent laterally at its lower end and then extended forwardly, as indicated at 49, which at its front end is equipped with a head 50 to bear against the outer side of the flange 44. rllhe arm 49 is of angle form, the head 50 being at the front end ofthe horizontal leg while the vertical leg` is eX- tended farther forward and carries a roller 51 which bears againstr the inner-side ofthe 'flange 44. vTurning theniembers lxaccordingly varies the position of the vlatching'members yassociated With them. vInthe 4.normal position of the shafts l27T and 28, that isfwith the operating bellcranklever shown in Fig. 2 at centraliieutral positionthe canrmembers 43 andthe latches are as shown in Fig: 6. By

rocking' the shaft 27 in'one direction to the position shown in IFig. 5shaft 28y being rocked in the same direction carries its cammember 43 to the position shown in Fig. 5 sothat ythe roller 51 rides against the curved'surface 46 and nieves the inner corner 52'of the part 48 ,partly over the pin locking it in its socket.

Fach of these cam members is of the shape shown in Fig.'7 and is likevviseprovided With a surrounding rearwardly proj ecting flange against the outer side of Which the heads of the latchingmembers bear `While the rollers T51 ofthe latchingfmembers bear against their inner sides. `Thefflanges of the cam members 13a include a portion 53 curved about the `centers ofthe shafts27 and 28, joining with a reversely `curved lportion '54. Then the shafts 27. andl28areat neutral position the rollers 51 ride on the reversely curved parts 54: and move-the latcliing members so that the corners 52 lie over-thepins 25l and lock*- them in their sockets asshown in Fig. 7 Turning shaft 27 in aclockwise direction, the

same as it has beenfmovedin Fig'. 5, serves tov carry the latching member to disengage vfrom the pin.25,vvhile at the same time the turning of the cam member 43a on the shaft 28 in a `clockwise direction merely causes the roller 51 to bear against the curved surface 58 Which is concentricwith shaft 27 holding the oppositepin 25 locked. n

loth pins 25 at the front are normally unlocked ink their sockets26a, and with the rearward movement of the cross head 10, the body may betilted upwardly as shown inFig'. 1

with shaft 21 turning-in its. bearings ,22, and

with both ofthe rear pins 25 locked in their sockets 26 as indicated in Fig. 7. Operating the control lever 88 to one vside rocks the shafts 27 and 28, unlocking the pin 25 at the rear at one side of the body and-locking the pin 25 at the'front at the opposite side of the body in their respective sockets. If the control lever 36 is moved the opposite Way from central neutral position the opposite front pin 25 is lockedl in its socket and the opposite rear pinren theother side of the truck is unlocked. yWhichever Way theV control y lever 38y is moved from normal central neutral position, tWo of the pins 25 those on the same sideof the body are lockedin their sockets 26 I`and26a while the other pins 25 on'the oppo site'side are freefin their sockets 26 and 26a.

Then When the cross head 5 moves to the rear the body'tilts vabout thefaxis of the pins 25 PWlii'ch remain locked intheir sockets, While the unlocked pins areelevated out of their sockets, asshoWn in Fig. '5. Thebodymay be tilted to either side depending which pair -of pins at a sideofthe body are freed or locked in place.

When the body is tilted for rear dumpingy of'its contents Without the-provision of other means to insure that the pins 25 rein-ainlocked in the rear sockets 26, the same might be- -f' come unlocked When the rollers 51 move out of engagement With the flanges on the meinbers 43a. As shown in F ig. 8, with the continued upwardly tilting ol the body about the aXis ofthe shaft'21, the rollers 51 are,

moved upwardlyand to the rear anddisengage from the members 43a.v Accordingly, the latches at the rear end, particularly the horizontal arms 49 thereof, are equipped with laterally extending' Wings `55 (see'Fig. 8) which, as the bodyfis tilted more and'more, come underneath'retaining devices 56'fas- Atened to. and.4 extending from the cam meinbers ltliereby holding the latchingmembers in place over the rearfpins 25.

This construction makes it possible for the operator of the truck to use one controllever alone,`namely, the lever 38, to select which voflthe'three dumping operations is ter be performed.l If the lever'is leftvat central neutralgposition the truck lead'is dumped-to the rear when the hydraulic tilting apparatus is put to work. If'ithe lever 38is moved to one side then the contents ofthe vbody lwill be dumpedat one side of the truck While if it is movedfto-tlie opposite side the contents of the bodyv will bedumpcd at the opposite side ofthe truck. Of course, Whenever a seleclease-the latch 18, if it is to be a rear dumpingl of such contents.

This construction is practical, durable, sim-V ple .in operationand does not get out of order under the severe usage to `which an apparatus of this character Visput in service. The invention is deiined` in the appended 'claims and is to be considered comprehensive o'f all forms of structure coming Within their scope. f i 1 f l claim: f '1. In combination, a truck fiame, a body mounted above the truck frame, bearing` pins mounted on said body, one adjacent cach cornerthereef, socketsl carried by saidl frame in lwhich the bearing pins seat, a horizontal yshaftl vmounted on the frame transversely 

